Use this forestry calculation to summarize a measured tree, plot, canopy, fuel, biomass, carbon, growth, density, or wood-volume quantity under a stated inventory convention.

Starting Basal Area (m2/ha)

Required number input.

Ending Basal Area (m2/ha)

Required number input.

Percentage change in stand basal area from start to end inventory. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Increment Percent (percent)

The resulting increment percent returned as a number.

• Inventory summaries depend on breast-height definition, inclusion threshold, plot design, bark treatment, slope correction, damaged stems, measurement error, and expansion weights. Arithmetic and basal-area-weighted means answer different questions.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Use locally validated equations and inventory protocols, retain species and measurement metadata, aggregate with appropriate plot expansion and sampling weights, and report uncertainty with stand-level results.

• Volume Increment Percentage

  Percentage change in stand volume from start to end inventory.

• Periodic Increment Percentage

  Percentage change in a stand metric over an inventory interval, without annualization.

• Basal Area Growth Annual

  Average annual stand basal-area change in square metres per hectare.